From: Hydrological problems of flash floods and the encroachment of wastewater affecting the urban areas in Greater Cairo, Egypt, using remote sensing and GIS techniques
Time zones from outlet to upstream (hours)
Area (square kilometer)
Effective rainfall (mm)
Resulting runoff (cubic meters)
1
41
20
820,000
2
55
1,100,000
3
45
900,000
4
5
32
640,000
6
37
740,000
Total
255
4,800,000